The wall thickness of steel tube can't be an equivalent all over, and there exists the development of wall thickness difference objectively on its cross section and longitudinal tube body, that is, uneven wall thickness.In order to manage this irregularity, the allowable index of wall thickness irregularity is stipulated in some steel pipe standards, and it's typically stipulated that it shall not exceed eightieth of the wall thickness tolerance (to be enforced once consultation between the provider and therefore the supplier).ovalityIn the cross section of circular steel tube, there exists the development of unequal outside diameter, that is, there's not essentially reciprocally perpendicular most and minimum outside diameter, then the distinction between the utmost and minimum outside diameter is oblateness (or unroundness).In order to manage the ovality, some steel pipe standards stipulate the allowable index of ovality, that is usually stipulated to be no over eightieth of the outer diameter tolerance (to be enforced once consultation between the provider and therefore the supplier).
Cangzhou Steel Pipe Group (CSPG) Co., Ltd. is a large-sized, key metallurgic enterprise of Hebei Province in North China, whose history dates back to 1994. CSPG currently em/paces six member companies with products varying from SSAW, LSAW, ERW, seamless steel pipes to 3PE pipes, galvanized pipes, casing pipes, etc. A Joint-stock corporation, CSPG occupies an area of 600,000 square meters with a total asset of $530 million.
Specialized in the production of straight welded pipe spiral pipe galvanized pipe 3PE/3PP/FBE/TPEP internal and external epoxy powder internal and external epoxy resin cement mortar two cloth three oil buried pipeline IPN8710 non-toxic drinking water internal and external plastic coated lining plastic and other anti-corrosion pipe fittings for oil and gas pipeline water conservancy projects
Executive standard :DIN30670 DIN30678 CSA Z245 AFNOR nf49-710/711 NACE rp0394/0490 AWWAC 210/C213GB/T9711 API 5L ISO 3183Material: Q235B/Q355BGR A GR B x42-x80 l245-l555
Business scope: 21.3mm-3620mmLSAW submerged arc welded pipe 325-2020mmERW straight welded pipe 6mm-711mmSMLS seamless tube 10-1120mmSSAW spiral steel tube 219-3620mmDemand for quality suppliers and partners